This great hairdryer is a bargain at under £30

Best hairdryer

Wondering which hairdryer to invest in? When the Good Housekeeping Institute last tested hairdryers from a range of brands, our top-performing model was an affordable option from high street brand Babyliss, and you can snap up it for just £27.50 on Amazon right now!

When we test hairdryers, we look at how well they dry hair and also consider factors including noise level, power and even the weight of each model.

With a score of 89/100, the Babyliss Diamond Hairdryer was praised by testers for being slimline and compact, so much so that it could even double up as a travel hairdryer.

Its outer casing was found to stay cool, but it’s powerful and quick to dry even very thick hair, and there are three heat settings and two power settings to choose from.

Babyliss Diamond Hairdryer review 

Overall Score: 89/100

Tested July 2015

The BaByliss Diamond Radiance Model 6421BDU Hairdryer has a 2200W motor, two power levels and three heat settings.

Available from:

Price when tested: £41.25

Loud – this product has been scientifically assessed and found to be louder than most in this category.

GHI Expert Verdict

The Babyliss Diamond Radiance Model 6421BDU Hairdryer is a slimline and very compact dryer that could double as a travel hairdryer. Its outer casing stays cool but it is powerful and quick to dry even very thick hair. However, it is noisy in use and is very hot on the highest setting.

Overall Score: 89/100


  • Ease of use: 4.5/5
  • Design: 4/5
  • Performance: 4.5/5
  • Instructions: 4/5


  • Nozzle and casing stay cool during use
  • Powerful on highest setting
  • Quick to dry thick hair


  • Noisy in use
  • When the hottest setting is used it is too hot to use near scalp

All product information provided by the manufacturer is correct at time of publication.